Listenner

public class WebServerListener implements ServletContextListener{

    private ServletContext context = null;  
 
    public void contextInitialized(ServletContextEvent event)  
    {  
        System.out.println("Server started!"); 
        context = event.getServletContext(); 
  
          //做java操作
     
        System.out.println("loading java web server listener........");

         
       // messageQueue.add(message1); 
         
        context.setAttribute("messageQueue", messageQueue); 
    }  
 
    public void contextDestroyed(ServletContextEvent event)  
    {  
        context = event.getServletContext(); 
        
         
        System.out.println("Server closed!"); 
    }  
}
<listener>
<listener-class>net.com.mickey.project.util.listener.WebServerListener</listener-class>
</listener>